Xfund is an early-stage venture capital firm founded in 2012 as a partnership between New Enterprise Associates (NEA), Accel Partners, Breyer Capital, and Polaris Partners. Initially known as The Experiment Fund, it was established to support student startups and technologies developed at Harvard University and MIT. The firm focuses on backing entrepreneurs who think laterally and experiment across disciplines, seeking out technically-gifted individuals with a liberal arts mindset.

Xfund has offices in Cambridge, Massachusetts, and Palo Alto, California, and has invested in companies such as 23andMe, Kensho, Gusto, Plaid, Robinhood, Patreon, Andela, and Philo.